stop start MERCEDES-BENZ C-CLASS CABRIOLET 2021 Owners Manual

1
Steering wheel gearshift paddles →
15 3
2 Combination swit ch →
121
3 Instrument display →
227
4 DIRECT SELECT le ver →
15 0
5 Media display →
247
6 Glovecompa rtment →
11 2
7 Start/ stop button →
13 8
8 Climate cont rol sy stems →
13 3
9 Calls up the main functions of the multimedia
sy stem →
251
A Hazard warning light sy stem →
121
B PASSENGER AIR BAG indicator lamps →
49
C Stow age compartment →
11 2
D Controller forvo lume and switching sound
on/off →
247
E Switches the multimedia sy stem on/off →
247
F Extends/r etra cts the seat belt extender →
41 G
Opens and closes the soft top →
81
H Activates and deacti vates AIR CAP →
84
I Opens thestow age compartment →
11 2
J Opening and closing the side windo ws →
88
K ECO start/ stop function →
14 6
L 360° camera →
206
M Sets theve hicle le vel →
202
N DYNA MIC SELECT switch →
14 9
O Touchpad →
24 8
P Control panel forth e multimedia sy stem →
228
Q Adjusting thesteering wheel electrically →
106
Switches thesteering wheel heater on/off →
107
R Control panel:
On-board co mputer →
228
Cruise cont rol or variable limiter →
17 7
Ac tive Dis tance Assi stDISTRONIC →
182
S Diagno stics connection →
29 At
aglance – Cockpit 7

Pr
otection of the environment
+ ENVIRONMENTAL
NOTEEnvironmental
dama gedue tooperating conditions and
personal driving style The pollutant emission of
theve hicle is
directly related tothewa yyo u operate the
ve hicle.
Operate your vehicle in an environmentally
re sponsible manner tohelp pr otect the envi‐
ro nment. Please obser vethefo llowing rec‐
ommendations on ope rating conditions and
pe rsonal driving style.
Operating conditions: #
Make sure that the tyre pressure is cor‐
re ct. #
Do not car ryany unnecessary weight
(e.g. roof luggage rack s once you no
lon ger need them). #
Adhere tothe service inter vals.
A regularly serviced vehicle will contri b‐
ute toenvironmen tal pr otection. #
Alw ays ha vemaintenance workcar ried
out at a qualified specialist workshop.
Pe rsonal driving style: #
Do not depress the accelera tor pedal
when starting the engine. #
Do not warm upthe engine while the
ve hicle is stationar y. #
Drive carefully and maintain a suitable
di st ance from theve hicle in front. #
Avoid frequent, sudden acceleration
and braking. #
Change gear in good time and use each
ge ar on lyup toÔ of its maximum
engine speed. #
Switch off the engine in stationary traf‐
fi c, e.g. byusing the ECO start/ stop
function. #
Drive fuel-ef ficiently. Obser vethe ECO
display for a fuel-ef ficient driving style. Ta
ke -back of end-of-life vehicles
EU countries onl y:
Mercedes-Benz will take back your end-of-life
ve hicle for environment-friendly disposal in
accordance with the European Union(EU) End-
of-Life Vehicles Directive.
A network of vehicle take -ba ckpoints and dis‐
mantlers has been es tablished foryo uto return
yo ur vehicle. You can lea veit at any of these
points free of charge . This makes an impor tant
contribution toclosing there cycling circle and
conse rving resources.
Fo r fur ther information about there cycling and
disposal of end-of-li fevehicles, and theta ke-
back conditions, please visit the national
Mercedes-Benz website foryo ur count ry. Gene
ral no tes 21

#
Only af fix accesso ries which ha vebeen
specially appr oved forth is ch ild
re stra int sy stem bythech ild restra int
sy stem's manufacturer. Mercedes‑Benz
recommends Mercedes-Benz
care products for cleaning child restra int sys‐
te ms recommended byMercedes-Benz.
Only use child restra int sy stems which are in
proper working condition &
WARNING Risk of inju ryor death caused
by the use of damaged child restra int
sy stems
Child restra int sy stems or their retaining sys‐
te ms that ha vebeen subjec tedto stre ss in
an accident may not be able toper form their
intended pr otective function.
It may be the case that thech ild cannot be
proper lyrestra ined. #
Alw ays immediately replace child
re stra int sy stems that ha vebeen dam‐
aged or in volved in an accident. #
Have the securing sy stems forth ech ild
re stra int sy stems checked at a qualified
specialist workshop before ins talling a
ch ild restra int sy stem again. Av
oid direct sunlight &
WARNING Risk of bu rns when thech ild
seat is exposed todirect sunlight
If th ech ild restra int sy stem is exposed to
direct sunlight or heat, parts could heat up.
Children could suf fer burns from these parts,
particularly on the me tallic parts of thech ild
re stra int sy stem. #
Alw ays make sure that thech ild
re stra int sy stem is not exposed to
direct sunlight. #
Protect thech ild restra int sy stem, e.g.
with a blank et. #
Ifth ech ild restra int sy stem has been
ex posed todirect sunlight, allow it to
cool before secu ring a child in it. #
Never lea vechildren unat tended in the
ve hicle. Obser
vewhen stopping or parking &
WARNING Risk of accident and inju ry
due toleaving children unat tended in the
ve hicle
If ch ildren are left unat tended in theve hicle,
th ey could, in pa rticular:
R open doors, thereby endangering other
persons or road users.
R get out and be stru ck byoncoming traf‐
fi c.
R ope rate ve hicle equipment and become
trapped, forex ample.
In addition, thech ildren could also set the
ve hicle in motion by,fo rex ample:
R releasing the parking brake.
R changing the transmission position.
R starting theve hicle. 56
Occupant saf ety

#
Switch on the ignition. #
Toactivate: pull button 1.
AIR CAP will extend and the indicator lamp on
button 1will light up. #
Todeactivate: press button 1.
AIR CAP will retract and the indicator lamp on
button 1will go out. If
th eve hicle is par ked with the soft top open
and the ignition is switched off, AIR CAP will
re tract au tomatical ly.
When youre start the engine af ter having been
par ked, AIR CAP will extend again au tomatically. Fi
tting and removing the folding draught
stop &
WARNING Risk of accident when using
th e draught stop in poor visibility condi‐
tions
The draught stop impairs your view tothe
re ar. #
Use the draught stop only in good visi‐
bility conditions. &
WARNING Risk of accident and inju ry
due toan incor rectly fitted draught stop
The draught stop may become loose while
yo u are driving and endan gerot her road
users. #
Fitthe draught stop as described. #
Do not place any objects on thefitted
draught stop. *
NO
TEThe draught stop can be damaged
if fitted when the soft top is closed The
vehicle interior or the draught stop can
be damaged if fitted when the soft top
closed. #
Tofit, open the soft top. *
NO
TEDama getothe draught stop due
to collision wi thseat backrests The draught
stop may collide with the front
seat backrests when fitted. #
Adjust the backrest positions of the
front seats. The
folding draught stop is fitted overth ere ar
seats toprotect against wind when you are driv‐
ing with the soft top open. Only the front seats
can be occupied when thefo lding draught stop
is fitted. Opening and closing
85

Pe
rform thefo llowing steps in sequence on bo th
sides of theve hicle: #
Pull handle 5inthe direction of the ar row. #
Align folding draught stop 1 with side fix‐
ture 4ontheve hicle from abo veand insert. #
Push handle 5onfolding draught stop 1
back as far as it will go.
Fo lding draught stop 1 is loc ked. Fo
llow the instructions in reve rse order to
re mo vethefo lding draught stop. Problems with
the soft top The so
fttop will not open or close.
Po ssible causes:
R The ignition is not switched on. #
Make sure that the ignition is switched on.
R The brake pedal is not depressed with the
ve hicle stationar y. #
Dep ress the brake pedal.
R The on-board electrical sy stem voltage is too
lo w. #
Start the engine.
R The boot separator is not closed. #
Remo ve ov erhanging luggage and close the
boot separator.
R The boot lid is open. #
Close the boot lid (/ page 80). R
The soft top has been opened and closed
se veral times in a row. The soft top drive has
been switched off automatically and will be
av ailable again af ter appro ximately ten
minutes. #
Repeat the opening or closing procedure
af te r appro ximately ten minu tes.
R You are driving at a speed greaterth an
60 km/h. #
Reduce your speed tobelow 60 km/h.
R The soft top mechanical components or con‐
trol sy stem are defective. #
Consult a qualified specialist workshop. Opening and closing
87

St
arting theve hicle with theke y in the
ma rked space (emer gency operation mode)
If th eve hicle does not start and thePlace the
key in the marked space See Owner's Manual
message appears in the multifunction displa y,
yo u can start theve hicle in emer gency operation
mode. #
Makesure that the mar ked space 2is
em pty. #
Remo vetheke y1 from theke yring. #
Place theke y1 inthe mar ked space 2on
th e symbol 3.
The vehicle will start af ter a short time.
If yo ure mo vetheke y1 from the mar ked
space 2,the engine continues running. For
fur ther engine starts ho wever,th eke y1
must be located in the mar ked space 2on
th e symbol 3during the entire journe y. #
Have theke y1 checked at a qualified spe‐
cialist workshop.
If th eve hicle does not star t: #
place theke y1 inthe mar ked space 2
and lea veitth ere. #
Depress the brake pedal and start theve hi‐
cle using thest art/ stop button.
% You can also swit chon the po wer supp lyor
th e ignition with thest art/ stop button.
Obser veany information rega rding display mes‐
sages that can be displa yed on the multifunction
displa y. St
arting theve hicle via Remo teOnline Serv‐
ices Cooling or heating
theve hicle interior before
st arting the jou rney
Ensu rethefo llowing before starting the engine:
R the legal stipulations in the area where your
ve hicle is par ked allow engine starting via
smartphone.
R it is safe tostart and runth e engine where
yo ur vehicle is par ked.
R the fuel tank is su fficiently full.
R thest ar ter battery is suf ficiently charge d.
Charging thest ar ter battery be fore starting
th e jou rney
If th eve hicle battery is dischar ged, you can
re cei vea message on your smartphone. You can
th en start theve hicle with the smartphone to
ch arge the batter y.The vehicle is automatically
switched off af terte n minu tes. Driving and parking
13 9

Ensu
rethefo llowing before starting the engine:
R the legal stipulations in the area where your
ve hicle is par ked allow engine starting via
smartphone.
R it is safe tostart and runth e engine where
yo ur vehicle is par ked.
R the fuel tank is su fficiently full.
St arting theve hicle (Remo teOnline) &
WARNING Risk of crushing or entrap‐
ment due tounin tentional starting of the
engine
Limbs could be crushed or trapped if the
engine is star ted unintentionally during
service or maintenance work. #
Alw ays secure the engine against unin‐
te ntional starting before car rying out
maintenance or repair work. Re
quirements:
R park position jis selected.
R the anti- theft alarm sy stem is not activated.
R the panic alarm is not activated. R
the hazard warning light sy stem is switched
off.
R the bonn etis closed.
R the doors are closed and loc ked.
R the windo wsand soft top are closed. #
Start theve hicle using the smartphone.
Af tereve ryengine start, the engine runs for
te n minu tes.
Yo u can car ryout a maximum of two consecu‐
tive starting attem pts. Yo u must start theve hicle
once with theke y before trying tostart the
engine again with the smartphone. you can stop
th eve hicle again at any time.
% Further information can be found in the
smartphone app.
Securing the engine against starting before
car rying out maintenance or repair work: #
switch on the hazard warning light sy stem.
or #
unlock the doors.
or #
open a side window or the soft top. Ru
nning-in no tes To
preser vethe engine during thefirs t1, 500 km:
R Drive at varying road speeds and engine
speeds.
R Do not drive at speeds greater than
14 0 km/h.
R Drive theve hicle in drive program A
or ;.
R Shift tothe next highest gear at theve ry lat‐
est when the needle reaches the last third
before there d area in there v counter.
R Do not shift down a gear manually in order to
brake.
R Avoid overstraining theve hicle, e.g. driving at
full thro ttle.
R Do not depress the accelera tor pedal past
th e pressure point (kickdown).
R Only increase the engine speed gradually and
accelera tetheve hicle tofull speed af ter
1, 500 km. 14 0
Driving and pa rking

Note
s on driving through water on the road
sur face
Wa ter which has entered into theve hicle can
damage the engine, electrics and transmission.
Wa ter can also enter the air intake of the engine
and cause engine damage.
Obser vethefo llowing if you must drive thro ugh
wate r:
R The wate r,when calm, may only reach the
lo we r edge of theve hicle body.
R Drive at a maximum speed of 10km/h;
wate r can otherwise enter theve hicle interior
or engine compartment.
R Vehicles tr avelling in front, or oncoming vehi‐
cles, can create waves which may exceed the
maximum permissible dep thofthewate r.
The braking ef fect of the brakes is reduced af ter
fo rd ing. Brake carefully while paying attention to
th e tra ffic conditions until braking po wer has
been fully restored. ECO
start/s top function Ope
ration of the ECO start/s top function
% Depending on the engine, the ECO start/
st op function is not available in all drive pro‐
grams. Obse rveth est atus display in the
multifunction display forth is.
The engine is switched off automatically in the
fo llowing situations if all vehicle conditions for
an automatic engine stop are me t:
R You brake theve hicle toast andstill in trans‐
mission position hori.
R Vehicles with a 48 V on-board electrical
sy stem: You depress the brake pedal when
tra velling at a low speed.
If th e sy stem has de tected one of thefo llowing
situations, the engine will not stop:
R Youstop at a stop sign and there is no vehi‐
cle in front of you.
R The vehicle that stopped in front of you
st arts up again.
R You manoeuv re, turn thesteering wheel
sharply or engage reve rsege ar. %
Ifth e sy stem de tects an intelli gent stop
inhibitor, forex ample, a stop sign, the engine
will not stop.
If yo u activate the HOLD function or engage
th e park position j,the engine can be
switched off in spite of an intelligent stop
inhibitor.
The engine is restar ted automatically if:
R You en gage transmission position hork.
R You depress the accelerator pedal.
R You open or close the soft top.
R An automatic engine start is requiredbythe
ve hicle.
R Youre lease the brake pedal.
R Vehicles with a 48 V on-board electrical
sy stem:
- Youre lease the brake pedal on a downhill
gradient and theve hicle does not roll.
- The vehicle rolls on a downhill gradient
and does not automatically enter glide
mode at 20 km/h. Driving and parking
14 5

ECO
start/ stop function symbols in the multi‐
function display:
R The symbol è(green) appears when the
ve hicle is at a standstill: The engine was
switched off bythe ECO start/ stop function.
R The symbol ç(yellow) appears when the
ve hicle is at a standstill: Not all vehicle condi‐
tions for an engine stop ha vebeen met.
R Neither the symbol ènorç appears
when theve hicle is at a standstill: An intelli‐
ge nt stop inhibitor was de tected, forex am‐
ple, a stop sign.
If th e engine was switched off bythe ECO start/
st op function and you lea vetheve hicle, a warn‐
ing tone sounds and the engine is not restar ted.
In addition, thefo llowing display message
appears in the multifunction display:
Vehicle is operational Switch off ignition before
exiting
If yo u do not swit choff the ignition, it is auto‐
matically switched off af terth re e minutes. Deactivating or activating
the ECO start/
sto p function #
Press button 1.
If indicator la mp2lights up, the ECO start/
st op function is activated.
% Depending on the model and theve hicle
equipment, the button may also be located
at a dif fere nt position in the cent reconsole. ECO displ
ayfunction The ECO display summa
rises your driving char‐
acteristics from thest art of the journey toits
completion and assists you in achieving the
most economical driving style.
Yo u can influence consum ption bydoing thefo l‐
lowing:
R Driving with particular care
R Driving theve hicle in drive program ;
R Observing thege arshift recommendations 14 6
Driving and pa rking

#
Release the brake pedal. #
Switch the ignition off.
% Ifyo uth en exitth eve hicle leaving theke y in
th eve hicle, the automatic transmission
re mains in neutral i.
Engaging park position P #
Obser vethe no tes on parking theve hicle
(/ page 161). #
Dep ress the brake pedal until theve hicle
comes toast andstill. #
When theve hicle is at a standstill, press but‐
to nj.
When the transmission position display
sho wsj,th e park position is engaged. If no
transmission position display jappears,
secure theve hicle topreve nt it from rolling
aw ay.
% Depending on the situation, it may take a
short time until jis engaged. Therefore,
alw ays pay attention tothe transmission
position displa y. Pa
rk position jis engaged automatically if one
of thefo llowing conditions is me t:
R You swit choff the ignition when theve hicle
is stationary and the transmission position is
h ork.
R You open the driver's door when theve hicle
is at a standstill or when driving at a very low
speed and the transmission position is hor
k.
% Tomanoeuvre with an open driver's door,
open the driver's door while at a standstill
and engage transmission position hork
again.
Engaging drive position D #
Depress the brake pedal and push the
DIRECT SELECT le ver down past thefirst
point of resis tance.
When the automatic transmission is in transmis‐
sion position h, it shiftsthege ars automati‐
call y.This depends, among other things, on the
fo llowing factors:
R The selected drive program
R The position of the accelera tor pedal R
The driving speed Problems with
the transmission The transmission has a
faulty gear shift
Po ssible cause:
R the transmission is losing oil. #
Have the transmission checked at a qualified
specialist workshop immediately.
The acceleration characteristics getwo rse,
and the transmission no longer shifts.
Po ssible cause:
R the transmission is in emer gency operation
mode: it is only possible toshift toone gear
and reve rsege ar. #
Stop theve hicle in accordance with the traf‐
fi c conditions. #
Shift the transmission toposition j. #
Switch off the engine. #
Wait at least ten seconds. #
Tryto start the engine again. 15 2
Driving and pa rking